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<title>Base64加密/解密工具 - 784040932</title>
<script type="text/javascript" language="javascript">
	var base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";var base64DecodeChars = new Array(
		-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
		-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
		-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
		52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
		-1,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14,
		15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
		-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
		41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1);
	
	function base64encode(str) {
		var out, i, len;
		var c1, c2, c3;
	
		len = str.length;
		i = 0;
		out = "";
		while(i < len) {
		c1 = str.charCodeAt(i++) & 0xff;
		if(i == len)
		{
			out += base64EncodeChars.charAt(c1 >> 2);
			out += base64EncodeChars.charAt((c1 & 0x3) << 4);
			out += "==";
			break;
		}
		c2 = str.charCodeAt(i++);
		if(i == len)
		{
			out += base64EncodeChars.charAt(c1 >> 2);
			out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
			out += base64EncodeChars.charAt((c2 & 0xF) << 2);
			out += "=";
			break;
		}
		c3 = str.charCodeAt(i++);
		out += base64EncodeChars.charAt(c1 >> 2);
		out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
		out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6));
		out += base64EncodeChars.charAt(c3 & 0x3F);
		}
		return out;
	}
	
	function base64decode(str) {
		var c1, c2, c3, c4;
		var i, len, out;
	
		len = str.length;
		i = 0;
		out = "";
		while(i < len) {
		/* c1 */
		do {
			c1 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
		} while(i < len && c1 == -1);
		if(c1 == -1)
			break;
	
		/* c2 */
		do {
			c2 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
		} while(i < len && c2 == -1);
		if(c2 == -1)
			break;
	
		out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));
	
		/* c3 */
		do {
			c3 = str.charCodeAt(i++) & 0xff;
			if(c3 == 61)
			return out;
			c3 = base64DecodeChars[c3];
		} while(i < len && c3 == -1);
		if(c3 == -1)
			break;
	
		out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));
	
		/* c4 */
		do {
			c4 = str.charCodeAt(i++) & 0xff;
			if(c4 == 61)
			return out;
			c4 = base64DecodeChars[c4];
		} while(i < len && c4 == -1);
		if(c4 == -1)
			break;
		out += String.fromCharCode(((c3 & 0x03) << 6) | c4);
		}
		return out;
	}
	
	function utf16to8(str) {
		var out, i, len, c;
	
		out = "";
		len = str.length;
		for(i = 0; i < len; i++) {
		c = str.charCodeAt(i);
		if ((c >= 0x0001) && (c <= 0x007F)) {
			out += str.charAt(i);
		} else if (c > 0x07FF) {
			out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
			out += String.fromCharCode(0x80 | ((c >>  6) & 0x3F));
			out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));
		} else {
			out += String.fromCharCode(0xC0 | ((c >>  6) & 0x1F));
			out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));
		}
		}
		return out;
	}
	
	function utf8to16(str) {
		var out, i, len, c;
		var char2, char3;
	
		out = "";
		len = str.length;
		i = 0;
		while(i < len) {
		c = str.charCodeAt(i++);
		switch(c >> 4)
		{ 
		  case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
			// 0xxxxxxx
			out += str.charAt(i-1);
			break;
		  case 12: case 13:
			// 110x xxxx   10xx xxxx
			char2 = str.charCodeAt(i++);
			out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
			break;
		  case 14:
			// 1110 xxxx  10xx xxxx  10xx xxxx
			char2 = str.charCodeAt(i++);
			char3 = str.charCodeAt(i++);
			out += String.fromCharCode(((c & 0x0F) << 12) |
							((char2 & 0x3F) << 6) |
							((char3 & 0x3F) << 0));
			break;
		}
		}
	
		return out;
	}
	
	function CharToHex(str) {
		var out, i, len, c, h;
	
		out = "";
		len = str.length;
		i = 0;
		while(i < len) 
		{
			c = str.charCodeAt(i++);
			h = c.toString(16);
			if(h.length < 2)
				h = "0" + h;
			
			out += "\\x" + h + " ";
			if(i > 0 && i % 8 == 0)
				out += "\r\n";
		}
	
		return out;
	}
	
	function doEncode() {
		var src = document.getElementById('src').value;
		document.getElementById('dest').value = base64encode(utf16to8(src));
	}
	
	function doDecode() {
		var src = document.getElementById('src').value;
		var opts = document.getElementById('opt');
	
		if(opts.checked)
		{
			document.getElementById('dest').value = CharToHex(base64decode(src));
		}
		else
		{
			document.getElementById('dest').value = utf8to16(base64decode(src));
		}
	}
</script>
<style type="text/css">
<!--
#src {
	font-family: Consolas;
	font-size: 30px;
	height: 48px;
	width: 60%;
}
.button {
	height: 54px;
	width: 10%;
	vertical-align: top;
}
#opt {
	
}
#dest {
	border: none;
	font-family: Consolas;
	font-size: 30px;
	width: 100%;
}
textarea {
	margin-top: 10%;
	outline:none;
}
footer {
	bottom: 20px;
	margin-bottom: 20px;
	position: absolute;
}
-->
</style>
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<body>

<div>
	<input autocomplete="off" autofocus="autofocus" id="src" name="src" onkeydown="if(event.keyCode==13){doEncode();}" onmouseover="this.focus();this.select()" type="text" />
	<input class="button" name="encode" onclick="doEncode();" type="button" value="加密" />&nbsp;
	<input class="button" name="decode" onclick="doDecode();" type="button" value="解密" />&nbsp;
	<input id="opt" name="opt" type="checkbox" value="16进制" />16进制&nbsp;
</div>

<p>
	<textarea cols="60" id="dest" name="dest" onmouseover="this.focus();this.select()" readonly="readonly" rows="1"></textarea>
</p>

<footer>
V1.0 By 784040932.
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